Hi Jay,
We are working hard on a 100% distortion-less preamplification module to the eAR power amps, with digital DSD and SPDIF input, else it would not be possible. That means all the eAR power amps can be upgraded, I still can't say the price and the release date, but our prices are reasonable as you know.
However, many like "colors", but actually, the "colors" (= distortion) has nothing to do with "audiophile" listening, IMO.
With the best regards,
Peter